Governor.



' Patented May 13, I902.

' E. ARMSTRONG.

G 0 VEB N 0 B0 (Application filed Nov. 20,, 1901- (No Model.)

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UNITED STArEs PATENT OFFICE.

EDWIN J. ARMSTRONG, OF ERIE, PENNSYLVANIA.

GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 700,004, dated May 13,1902. Application filed November 20, Serial No. 83,069. (No model.)

To all whom it may concern:

Be it known that I, EDWIN J. ARMSTRONG,

a citizen of the United States, residing at Erie, in the county of Erieand State of Pennsyl: Vania, have invented certain new and usefulImprovements in Governors; andIdo declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates generally to governors, and particularly toshaft-governors for steam-engines; and-it has for its object to providea shaft-governor of few parts, of simple and inexpensive construction,notliable to derangement by Wear, and which shall be capable ofcontrolling the speed of the engine to which it is attached with a highdegree of accuracy; and it consists of the parts and combinations of.parts hereinafter described and claimed.

In the accompanying drawing, forming a part of this specification, isillustrated a side:

elevation of my improved governor.

The two primary requirements in a gov-' ernor of this type are, first,that it should be balanced against the disturbing action of gravity,and,- second, that friction should be reduced to a very small amount.These requirements are met and the object above named attained by themechanism now to be described.

Referring to the drawing, A represents the shaft upon which thefly-wheel or carrier B is mounted. An eccentric O is mounted upon apivot a from the wheel or carrier and is adapted to be swung through asuitable arc thereon.

D is an arm extending laterally from the eccentric and pivotallyconnected at its free end to the end of a link E, the other end of saidlink being pivotally connected to a weight F, mountedon the free end ofaspring G, which is attachedto thev carrier or wheel.

The weight F is preferably made of such proportions that it willbalancethe eccentric 0, together withthe eccentric-strap and other partswhichmay be attached thereto.

The motion of the Weight and eccentric being in opposite directions, itis apparent that the disturbing action of gravity which exists of theweight.

where the movement of one part of a governor is not accompanied by amovement in the opposite direction of some other part of equal gravitymoment is provided against. The Weight F being carried by the spring Gand having its centrifugal force entirely resisted by saidspring, noneof the centrifugal force of said weight is transmitted through the pivots of the governor. Therefore the strains upon said pivots are verysmall vand not great enough to interfere with their proper lubricationor to cause serious wear.

The link E is so constructed as to be adj ustable lengthwise, whichwhile not essential to the proper working of the governor affords aconvenient adjustment for varying the positions, and consequently thecentrifugal force,

As shown, the link Eis composed of an internally-threaded member intowhich an externally-threaded member screws, and a nut is employed tosecure the parts in their adjusted position.

I am aware that a gravity balance in shaftgovernors is old in the patentto John E. Sweet, No. 252,276, January 10, 1882, and that it is also oldto mount a weightupon a spring so that the weight is both carried andits centrifugal force resisted by said spring, as shown by the patent toD. A. Woodbury, No. 107,7 46, September 27, 1870, and I make no claimfor such devices per se, but only to the means whereby the usefulresults obtained by the use of these two known devices are combinedin'the same governor, since the gravity-balance andthe removal of strainfrom the piv- Having thus described my invention,- what I claim as new,and desire to secure by Letters Patent, is-

1. The combination in a shaft-governor of a carrier, an eccentricpivotally mounted thereon and adapted to be shifted through'a'suitablerange, a centrifugal weight, a spring upon which said Weight is mountedand means whereby said weight and eccentric are'so con nected that theirmovements will bexin oppo site directions and of approximately equalgravity moment,thereby balancing the weight of the eccentric, and alsoso that the centrifugal force exerted by the weight shall not betransmitted through the pivots of the govnor that their movements shallbe in opposite 1o ernor. directions.

2. The combination inashaft-governor of a In testimony whereof I afifiixmy signature carrier, an eccentric pivotally mounted therein presence oftwo witnesses. on and adapted to be shifted through a suitable range, acentrifugally-acting weight, a EDWIN ARMSTRONG spring upon which saidweight is mounted, \Vitnesses: and a longitudinally-adj ustable linkconnect- JUSTIN P. SLOOUM, ing said eccentric and weight in such a man-ANNA E. NUNN.

